The influence of non-Kolmogorov turbulence on the entanglement of spatial two-qubit states in a slant channel |
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Authors: | Licheng Zhang Yun Zhu |
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Institution: | 1. School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, PR China;2. School of Science, Jiangnan University, Wuxi 214122, PR China |
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Abstract: | The effects of atmospheric turbulence on the entanglement of spatial two-qubit states that are prepared using the signal and idler photons produced by parametric down-conversion are studied. Utilizing the non-Kolmogorov model for atmospheric turbulence and Rytov approximation method, we quantify the effects of atmospheric turbulence on the entanglement of the two-qubit state in terms of Wootters's concurrence. Our results show that the effects of the zenith angle of communication channel and the outer scale of turbulence on the concurrence of a spatial two-qubit state can be ignored and the smaller inner scale of turbulence, the smaller refractive-index power α, the shorter wavelength of beams and the longer propagation distance will lead to the larger fluctuations of the concurrence of a spatial two-qubit state. |
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Keywords: | 42 50 Ar 03 67 Mn 03 65 Ud |
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